Votto, who played five innings and went 0-for-1 with a walk and a strikeout in Tuesday's rehab game with Class A Dayton, reported no issues.
"He did fine. I talked to him this morning," Reds general manager Walt Jocketty said on Wednesday. "He said he felt pretty good, a little sore. He'll play today and he'll see how he feels after today, tonight. We'll determine when he'll be ready to go."
In his second game on Wednesday, Votto had three plate appearances over five innings. He was for 1-for-2 with a first-inning single up the middle and a third-inning walk.
Jocketty felt optimistic that Votto could be activated Saturday when rosters expand for September callups.
Votto has been out of the Reds' lineup since July 16 because of torn meniscus cartilage in his left knee. He required two arthroscopic surgeries to repair the injury.